:root {
  --bg: #0e1116; --panel: #171c24; --panel2: #1e2530; --line: #2a3340;
  --fg: #e6edf3; --dim: #8b98a8; --accent: #3b82f6; --accent2: #60a5fa;
  --danger: #f87171;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(900px 500px at 30% -10%, #16202e 0%, var(--bg) 55%);
  color: var(--fg);
}
.card {
  width: min(380px, 92vw); background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 28px 26px; box-shadow: 0 20px 60px rgba(0,0,0,.45);
}
.brand { font-size: 20px; letter-spacing: .2px; display: flex; align-items: center; gap: 9px; }
.brand b { font-weight: 700; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.sub { color: var(--dim); margin: 8px 0 22px; font-size: 13.5px; }
form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; font-size: 12.5px; color: var(--dim); }
input {
  background: var(--panel2); border: 1px solid var(--line); border-radius: 9px;
  padding: 11px 12px; color: var(--fg); font-size: 14px; outline: none;
}
input:focus { border-color: var(--accent); }
button {
  margin-top: 4px; background: var(--accent); color: white; border: 0; border-radius: 9px;
  padding: 12px; font-size: 14.5px; font-weight: 600; cursor: pointer;
}
button:hover { background: var(--accent2); }
button:disabled { opacity: .6; cursor: default; }
.err { color: var(--danger); font-size: 13px; padding: 8px 10px; background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.3); border-radius: 8px; }